Abstract
Abstract
The definition of polytypism recommended by the IMA/IUCr joint committee on nomenclature is reviewed in the light of the structural variation observed in mineral and alloy systems. As a result of this review it is concluded that previous definitions of polytypism are too restrictive to be practical, and a definition which emphasises the structural basis of polytypism is proposed:
“Polytypism arises from the different modes of stacking of one or more structurally compatible modules.”
The various types of structural variation included under this definition are described using as examples minerals, ceramics, and alloys.
Subject
Inorganic Chemistry,Condensed Matter Physics,General Materials Science
Cited by
20 articles.
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